1. Proton Position Tracking X. Ding, D. Cline UCLA H. Kirk, J. S. Berg, BNL Phone Meeting on Aug. 25, 2009

2. Multiple Proton Beam Entry Directions The Required Beam Position at z=-75cm to Keep Same Crossing Angle and 24 0 Roll Angle Apart at z=-37.5cm Hg Jet: (0, 3.64, -75) r j =0.4  j =96.68 mrad P0: (-0.56, 4.62, -75)  b =123.73 mrad P7: (-0.103, 2.638, -75)  b =70.45 mrad All entry directions of Hg jet and proton beam which have small angles to solenoid axis are down at z=-75cm

3. Multiple Proton Beam Entry Directions Meson 40MeV<KE<180 MeV at 50m for Same Crossing Angle and 24 0 Roll Angle apart at z=-37.5cm p11 p6 p4

4. Beginning position where the beam hits a vertical plane

5. X-Z plot of launched protons which meet horizontal plane at y=-14cm Hg Jet(0, -14, 106.86) p0(-4.85, -14, 84) p9(-3.47, -14, 157.2) p10(-1.94, -14, 130.4) p11(-1.40, -14, 109.6) p12(-1.59, -14, 95) p13(-2.3, -14, 86.1) p14(-3.42, -14, 82.3)

6. X-Z plot of launched protons which meet horizontal plane at y=-20cm P10 (-5.1, -20, 212) atan(py/pz) 3.98 0 P11 (-4.52, -20, 179.4) atan(py/pz) 4.69 0 P12 (-4.36, -20, 157.7) atan(py/pz) 5.23 0 P13 (-5.4, -20, -145.4) atan(py/pz) 5.52 0 Hg Jet (0, -20, 168.72) to sol. axis 5.54 0